/Engine/Plugins/Online/OnlineSubsystem/Source/Public/Interfaces/OnlineFriendsInterface.h
Starts an async task that delete an alias from a friend.
void DeleteFriendAlias ( int32 LocalUserNum, const [FUniqueNetId](API\Runtime\CoreOnline\Online\FUniqueNetId) & FriendId, const [FString](API\Runtime\Core\Containers\FString) & ListName, const [FOnDeleteFriendAliasComplete](API\Plugins\OnlineSubsystem\Interfaces\FOnDeleteFriendAliasComplete) & Delegate )